Elmwood, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.4 °F (low) to 78.4 °F (high). Annual precipitation averages 65.7 Inches. Elmwood is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.3 °F | 62.0 °F | 5.53 in. |
| February | 48.7 °F | 65.8 °F | 4.28 in. |
| March | 55.0 °F | 72.0 °F | 4.52 in. |
| April | 61.7 °F | 78.5 °F | 4.84 in. |
| May | 69.3 °F | 85.4 °F | 5.58 in. |
| June | 74.9 °F | 90.2 °F | 7.43 in. |
| July | 76.7 °F | 91.6 °F | 7.61 in. |
| August | 76.7 °F | 91.4 °F | 7.3 in. |
| September | 73.6 °F | 87.9 °F | 5.51 in. |
| October | 64.5 °F | 80.5 °F | 3.81 in. |
| November | 54.3 °F | 70.6 °F | 4.13 in. |
| December | 48.0 °F | 64.4 °F | 5.18 in. |
| Annual | 62.4 °F | 78.4 °F | 65.72 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |